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Preconsolidation pressure from piezocone tests in marine clays

From National Research Council Canada

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  1. National Research Council of Canada
FormatText, Article
Subjectmarine clay; stresses; laboratory testing; yield envelopes; vertical yield stress; porewater pressure; foundation designs; eastern canada; piezocone penetrometer; marine clay deposits; stress history; elasto-plastic soil behaviour; overconsolidated (oc) soil; contrainte (mécanique)
Abstract
Piezocone penetration tests were carried out at five sites in marine clay with overconsolidation ratios ranging from 1. 3 to 4.8. A simple model for the behaviour of these clays indicates that the effective vertical yield stress mobilized along the cone axis during penetration is equal to the difference between the actual induced total vertical stress in the soil and the total porewater pressure. The actual induced total vertical stress can be derived from piezocone test data. Theoretically the ratio of the vertical yield stress inferred from piezocone results and the preconsolidation pressure should correlate with the overconsolidation ratio. This hypothesis is supported by the field laboratory investigations presented in this study.
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  • Geotechnique 37, no. 2 (1987): 177–190.
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1551
NRC numberNRCC 29196
NRC-IRC-1266
NPARC number20386522
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Record identifierf6c678b4-df9d-4649-8e53-338bdee7bed1
Record created2012-07-25
Record modified2020-06-06
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